Product made out of a non-woven material with three-dimensional stamping, a method of its production and a device for its realization

FIELD: production of a product made out of a non-woven material with a three-dimensional stamping.

SUBSTANCE: the invention is pertaining to a product made out of product made out of a non-woven material with a three-dimensional stamping, in particular, of a flat form consisting of fibers and-or elementary filaments and having on its both sides the areas with uniformly or non-uniformly alternating elevations and the excavations and separated from each other across a direction of the material driving by non-stamping solid sections, which are drawn out in the direction of the drive of the material and occupy from 5 up to 50 % of the surface of the non-stamped non-woven material. At that the elevations arranged on one side form on the opposite side an excavations, and correspondingly the excavations arranged on one side form on the opposite side of elevations. At that the elevations located on both sides are made boldly protruding in respect to the surfaces, which are on both sides formed by imaginary prolongation of the surfaces of non-stamped solid areas. The offered invention also concerns the method of manufacture of the above-stated product and the device for its realization. The offered invention ensures production of a stamped non-woven material, which not require an additional stabilizing layer, after previous compression would return its initial form better, than the so far known versions and which due to that would be better suitable for absorption of liquids of a different composition or for transportation of the liquids into an absorption layer.

EFFECT: the invention ensures production of a stamped non-woven material not requiring an additional stabilizing layer, better than the so far known versions restoring its initial form after compression, better suitable for absorption of different liquids and for their transportation into an absorption layer.

22 cl, 7 dwg, 4 tbl

 

The technical field to which the invention relates.

The invention relates to embossed non-woven material with open pores and the three-dimensional structure, method of manufacture and used in this device. Non-woven material consists of evenly alternating areas with a stamped, reduced weight three-dimensional elevations and nevydumannymi, flat and unchanged by weight zones. The invention relates, furthermore, to specific methods of printing and the necessary geometry of the shafts to give a nonwoven material, a special three-dimensional embossed patterns after passing through the pressure gap between the two members of each other's positive and negative shafts.

The level of technology

The absorbing core of baby diapers and products for those suffering from incontinence and feminine hygiene products covered today on the carrier side, i.e. facing toward the body side of the at least two layers. Between the covering nonwoven material, or a perforated film and the absorbing core is vpityvaya-distribution layer (HRV) from non-woven material or reticulated foam, which is what the name suggests, quickly absorbs contained in the body fluid (urine, loose stool or menstrual flow) and evenly distributes on the underlying, the condition is usually of cellulose and superparadise powder absorbent core. Due to this, on the one hand, the skin is maintained in a dry condition, resulting prevented her irritation, and, on the other hand, prevents the leakage is contained in the body fluid sides of the product. On the reverse side of the absorbing sanitary article is sealed against penetration of contained in the body fluid waterproof film or a laminate of nonwoven material and a film.

For HRV known thermally connected in blown hot air dryer non-woven materials or related polymer dispersions of non-woven materials made of twisted fibers with a relatively high titer. Fibers have a titer of more than 3.3 decitex and consists predominantly of polyester (polyethylene terephthalate) and/or polyolefins, and in order to bind the fibers in a flow furnace use bicomponent fiber with the location side by side (structure Side-by-Side") or the structure of the core/shell, and one of both components of the fibers has a substantially lower melting temperature than the other component. Such nonwoven materials have in relation to their low weight directly after their manufacture relatively high volume (thickness). But you know that the initial thickness when winding material with normal practice, the tension decreases markedly, and the conditions of compression in the package additionally contribute to the reduction of thickness.

So I already proposed solutions to achieve the required thickness is not only due to more or less statistically distributed twisted fibers and binding, but also give so convoluted fibrous nonwovens by corrugating or other geometric orientation of the third dimension, hereafter referred to as the z direction. Proved that it can achieve a higher resistance to compression than with the so-called non-woven materials "High-Loft", with the result of significantly lesser thickness loss when going through the stages of manufacture of the diaper, including packing and storage.

In DE 19725749 A1 describes a method of stamping for the manufacture of structured voluminous non-woven material. When this pre-bonded spunbond nonwoven material, filament which were extended only 50-70% of the maximum possible extraction, subject to the special refinement. It consists of passing a spunbond nonwoven material between the positive shaft, with rough surface and negative shaft zemelnye ribs transversely to the working direction of the machine, whereby the slats are free from bumps in the track. The result is a three-dimensional non-woven material with portions of the cone is made of hills, surrounded linear undeformed areas.

The lack opisanog is in DE 19725749 A1 method of embossing is he is limited revitalume or partially stretched nonwoven materials made of filaments (spunbond nonwovens. Such non-woven materials consists of Naismith of filaments with a great title, which are known to lead to hard, rough and notextile products and therefore are not implemented as HRV in diapers. Even filament structure "Side-by-Side" or an asymmetric structure of the core/shell does not result in a partially extended condition to izbitosti. Its perform is usually only due to thermal modification, which, as is known to the specialist, due to the resulting crystallization prevents vitiagivaet (or strain). Thus, there are no prerequisites applicability is described in DE 19725749 A1 method of stamping.

In EP-0809991 and EP-A 0810078 described material for distributing fluid with improved liquid properties. Here plastically deformable fabric by passing through a pair of negative and positive shaft is deformed in the non-woven fabric with three-dimensional structure. One variation in both the above applications are embossed material and the manufacturing method, which is described in EP-0499942. Such structures such as corrugated cardboard, however, have the disadvantage that they do not withstand prolonged compressive loads.

From EP-A 0976375, 0976374 and 0976373 known absorbent disposable products with facilitative layer, the latter consists of a corrugated nonwoven material, glued on a flat basis (ER-AND 0976375). Instead the basis for the nonwoven material can also be thick polymer filament (EP-A 0976374) or grid (EP-A 0976373). Such corrugated and stable basis laminates have been adequate as DIF for delay faeces and improved retention of urine. The manufacture of such a three-dimensional laminated structures is, however, very complex and requires two components, and in some cases, additional glue. The use of thick monofilament (with titers in the range of a few thousand dtex) was, however, unsuitable, poskolkulitsa monofilament devicenote (or out of a Spinneret with holes) and therefore with a strong mechanical load in the direction of movement of the machine in the manufacture of stretch diapers with thinning filament, i.e. in this regard have unacceptable property.

Disclosure of inventions

The present invention is to eliminate the above described disadvantages of the prior art and the creation of an embossed nonwoven material, which, without additional stabilizing layer, after a previous compression better take its original shape than known before execution, and that due to this would be better suited for the absorption of liquids of different composition or transportation of liquids in the absorbent layer. The basis of the invention lies next the task of creating a method of manufacturing a non-woven material and device suitable for implementing the method. In particular, the manufacturer of diapers can be proposed device for stamping in addition to lines for the manufacture of diapers, which would allow him to turn the non-embossed two-dimensional non-woven material in the manufacture of diapers in three-dimensional embossed non-woven material with improved moisture absorption and blagoraspolojeniya and place it in the diaper or dressing material. In addition, non-woven material must also have the ability to manufacture regardless of the manufacture of diapers and without significant changes to have the above properties after interim storage, the deposits in the collapsed state.

According to the invention offers the product flat form non-woven fabric with three-dimensional stamping. Non-woven material with three-dimensional stamping consists of oriented mainly in the direction of unwinding of the material (which hereinafter is meant the direction of movement of the material relative to the machine or installation for manufacturing) fibers and/or of filaments and has on both of its sides area with evenly alternating elevations and depressions separated from each other across the direction of feed of material non-embossed solid areas, which are elongated in the direction of unwinding the material and take from 5 to 50% of the non-embossed surface of the nonwoven material, and exaltation (4A, 8A)located on one side, is formed on the opposite side of the recess and accordingly, the recess located on one side, is formed on the opposite side of the elevation, and the elevation on both sides have been pronounced exposed, so that in the preferred embodiment, the tops of the speakers on both sides of the elevations in most of the concern imaginary planes, separated from each other at a distance of from 0.5 to 5.5 mm, giving a non-woven material corresponding apparent thickness, and in the most preferred embodiment, this distance is approximately the grants from 0.9 to 4.5 mm

In other preferred versions of the invention, the continuous areas occupy in relation to the total area of the nonwoven material is from 10%to 33%. Fiber or filament is oriented mainly in the direction of unwinding of the material.

In the invention described nonwoven staple fibers whose surface in the direction of the machine are evenly alternating elevations and depressions (peaks/valleys) and every a number of elevations/depressions interrupted undeformed linear plot. Unde linear plots are three-dimensional deformed non-woven material location from symmetric to asymmetric ridges and valleys, respectively, of an adjacent parcel.

In one preferred form of execution of the deformed vertices and valley areas are symmetrically along the undeformed line sections.

The number of respectively the following sections, strain across the direction of movement of the machine, are arranged in the direction of movement of the machine in a checkerboard pattern with the next adjacent corrugation.

Corrugations are exactly in the direction of the machine.

The invention also relates to a method of manufacturing described above, which produce the nonwoven material of fibers and/or of filaments, landmarks is the R mainly in the direction of unwinding of the material relative to the installation, used in its manufacture, and which connect with each other, and the resulting non-woven material is treated at a temperature of from 65 to 160°using at least one tinylogo shaft and attach non-woven material three-dimensional shape.

In preferred variants of the invention, the fiber or filament connect binder that is applied to the canvas with one or two sides. Glue may be added to the lubricant.

However, only continuous areas before, during or after deformation tinyline shaft increase through at least one re-application of the binder on one or both sides. Repeated application of the binder is carried out by spraying or padding on solid land.

Staple fiber two-dimensional non-woven fabric for three-dimensional stamping is placed for this purpose in the direction of the machine.

Fibrous pile can be further reoriented along this preferred direction by means of a crimping device.

Staple fibers are laid in the direction of the machine pile of convoluted in two and/or three dimensions.

Fibers made of such polymers, which create a high force of elasticity relative to the mechanical force. Particularly pertinent was polietilene ephtalite fibers with a titer of 3.3-30 decitex, mostly, however, 6,7-18 dtex. Fibers with different title can be mixed with each other.

Pile of staple fiber are related to either the adhesive through the use of aqueous polymer dispersions by known methods or by use of heat and pressure in a pair of calender rolls. In the case of passing through the circulation oven bicomponent fiber as a binder fibers add to homophily fibers.

Non-woven material to be deformed by embossing contains hydrophilic, good wetting of the surface-active agent (tensed), which is already applied by the manufacturer of the fibers or fiber and/or printed on non-woven material subsequently and/or made used of polymer dispersion in non-woven material. Tense may be differently expressed adhesion to the fibers and, thus, can be washed away, or you may have from polustoyachie to full resistance to contact with contained in the body fluid.

In the case of the adhesive connection using the aqueous polymer dispersion based on a copolymer of butadiene, such as, for example, butadiene-styrene or a copolymer of butadiene and Acrylonitrile. Binder mainly free from cross-linking components and remains after application in non-woven material in termoplasticheskie deformable state. Hardness And shore cast di the Persia binder film is in the range of 70-100, mainly 75-95.

Section staple fibers may have different shapes, for example round, oval, triangular, quadrangular, rectangular. Fibre-forming polymer may be distributed over the whole cross section of the fibers with the same density. The fiber may also be hollow, and the cavity may comprise 10-30% of the total fiber volume.

For a method of embossing, according to the invention, any suitable shaped single-component synthetic fibers, which in terms of stamping do not shrink or even melt. Twisted synthetic fibers can also be mixed with revitalume neizbityj fibers, however, in the amount of ≤50%.

Deformable in a three-dimensional structure of the base material contains predominantly polyester fiber, if the connection of non-woven material is by using a water dispersion. The ratio of fiber:binder is 20:80-40:60. A binder can be applied by known methods such as impregnation in foamed condition, unilateral add in "the sting" or gasket "wet on wet". A binder can be uniformly distributed over the cross section of non-woven material or have the gradient of the applied amount of the binder from one side to the other. Drying temperature and the residence time in the dryer should be chosen so that there was a full film formation polymer clay is. It is possible to set the transparency (non-pigmented binder) points of the binder.

The pile of staple fibers of the precursor may consist of one or up to three layers. Three layers are mainly increasing the average titer from one layer to the respectively next adjacent layer. After the three-dimensional deformation of the multilayer non-woven material, facing the rough (with a higher titer) fuzzy side to the lower side of the nonwoven covering material is placed in the diaper as HRV. The embossed nonwoven material with gradient distribution of the binder over saturated binding side in contact with the absorbent core or the surrounding hydrophilic blown from the melt by canvas or thin paper (eng. Core Wrap).

The invention also proposes a device for implementing the above method. It contains at least two tinylinux shaft mounted in engagement with each other with the possibility of transmission between them and the deformation of the nonwoven material, and tinyline shafts consist of toothed disks arranged on the axis and separated from each other by spacers.

In preferred embodiments of the invention the toothed discs have direct or oblique teeth and are made of the same or different materials, including iron, copper, luminy or their alloys or polymers. Toothed disks of the same tinylogo shaft can be made of aluminum, and the other tinylogo shaft is made of polyamide.

Heated can be performed only one tinily shaft, and the device may contain for this teploizolyatsii.

Brief description of drawings

The invention is explained in more detail using the figures which represent:

figure 1 is a top view of a three-dimensional deformed non-woven material according to the invention;

figure 2 - cross section of a three-dimensional strain nonwoven material according to the invention, along the line 9-9;

figure 3 - cross section of a three-dimensional strain nonwoven material according to the invention, along the line 27-27;

4 is a schematic representation tinylogo shaft;

5 is a cross-section tinylogo shaft;

6 is a schematic depiction of a device according to the invention;

Fig.7 is a cross - section of the toothed disk.

The implementation of the invention

Embossed non-woven material 1 with three-dimensional stamping shown in figure 1 when viewed from above. Position 2 denotes the direction of movement of the material relative to the machine (or Vice versa) when it is processed, referred to the direction of unwinding. Non-woven material comprises oriented in the direction of 2 the drawing of the fibers 3, interconnected by known methods. Non-woven material 1 is in the direction 2 of the drawing two constantly repeat the stories of zone 5, 7 and section 6, and zone 5, 7 are three-dimensional embossing, and each located between zones 5, 7 plot 6 remains in the non-embossed condition. Elevation zones 4A 5 alternate with depressions (valleys) 4b. Within zones 7 exaltation 8A and deepening 8b are, for example, in a checkerboard pattern with elevations recesses 4A and 4b zones 5. Non-woven material 1 consists, therefore, of the two surfaces, and exaltation form one surface, and a recess - another. Figure 2 shows a section along the line A-a with the view of it across the direction 2 of the drawing. In the foreground is visible undulating three-dimensional structure formed by adjacent arcuate elevations 4A and recesses 4b. Behind these bumps in the foreground in the direction 2 of the drawing is held the second wavy line, characterized by elevations 8A and valleys 8b. Items 8A and 8b are respectively staggered with elements 4A and 4b.

Figure 3 shows a section along the line B-b (i.e. crosswise to the direction 2 of the drawing) as the foreground and the view in the direction 2 of the drawing as the background (dashed line). The specific gravity of a non-embossed areas 6 significantly higher than in adjacent zones 5, 7. The specific gravity of a three-dimensional embossed zones 5, 7 is reduced by the factor derived from dividing the distance 28 on the perimeter from point 29 to point 30. If, for example, the R, the specific gravity of a non-embossed nonwoven fabric is 60 g/m2the distance 28 has a length of 6 mm, and the perimeter from point 29 to point 30 is a length of 15 mm, three-dimensional embossed zones along its surface specific gravity is 24 g/m2that corresponds to a marked thinning of the material within the embossed areas on 60% of the fibrous mass. Higher specific gravity at stations 6 in combination with intact there relationships fibers determines the preferred property of non-woven material that it, in General, without additional stabilizing layer, after a previous compression better returns to its original shape than all known still run, with the result that the nonwoven material is better suited for the absorption of liquids of different composition or transportation of liquids in the absorbent layer.

Figure 4 shows tinily shaft 21. On the axis 13, provided with a clamping wedge 14, alternately wearing the toothed discs 11 and spacers, for example, in the form of netupdate spacer disk 12 of smaller diameter. The diameter of the spacer disk 12 corresponds to the diameter of the toothed disc 11 in its lowest places 17 (depression).

Figure 5 shows a cross-section of such tinylogo shaft 21. The teeth 15 of the front toothed disc 11 are elevation 16 and recesses 17. For the toothed disc 11 on the axle 13 by its own groove 18 put into boaty disk 12 (not shown) with a diameter of 19.

Presented on Fig.6 tinily mechanism consists of at least two members engaged with each other tinylinux shafts 21, 22. At least one of them made with the possibility of heating. For heating the surface of the shaft can be optionally placed source 26 of heat. Non-embossed canvas 20 of nonwoven material passes in the zone 23 through incoming engages between the teeth of both tinylinux shafts 21, 22 and deformed in the non-woven material with three-dimensional stamping with the new surface structure, which contributes to heating. The receiving shaft 24 has a rough surface 25, which promotes the further transportation of the material.

Tonilee the device can be operated at a maximum width of approximately 220 see In a more narrow form of execution when the width of the shaft 55-125 cm, mainly 65-90 cm, it can be embedded in a machine for the manufacture of diapers. This is a special form of execution of the method, which gives the advantage that you can put a flat rolled product, cut into "slices", and avoid the logistical problem of laying strips in cardboard boxes (fastooning) or expensive cross-winding (spooling).

The method according to the invention, with a special embossed in a machine for the manufacture of diapers has the additional advantage that natisnjeni the nonwoven material with the function of absorption and distribution of liquid can be condensed stronger than non-woven material which is not subjected to three-dimensional stamping. Non-embossed roll material is always associated with the problem that the core of the paper roll near-sleeve is stronger compression in thickness than in the outer zone, which even after posting a diaper is not fully aligned. The master roll 3-inch (7.6 cm) core as the inner diameter linked by a connecting vpityvaya-distribution of non-woven material, is wound to the outer diameter of 114 cm, gives 2500-3000 meters per roll. Due to the lower hardness of the roll could, however, largely solve the problem of compression in the core of the roll, however, this involves the disadvantage that the coil will have less linear meters, and this increases costs. The method according to the invention, or made it embossed surround ready material allows a noticeably stronger non-embossed seal of the material with the advantage of eliminating the aforementioned problem of compression in the core of the roll and logistics benefit from significantly more linear feet per roll.

Non-embossed nonwoven fabric with a unit weight in the range of 30-100 g/m2mostly 40-80 g/m2has a thickness of 0.20-1,50 mm, mainly 0.35 to 1.20 mm, measured at a load of 0.5 kPa. Thickness after embossing head of the Sith in the first place from the height of the teeth, the distance between the teeth (the degree of engagement) and secondarily from the specific mass of the non-embossed nonwoven material. The thickness of the embossed nonwoven material, measured by the imaginary conducted through elevation planes 27, is in the range of 0.50-5,50 mm, mainly 0,90-4,50 mm

The width of the zones 5, 7 embossed toothed disks is in the range of 3.0 to 20 mm, mostly 6-12 mm. Zone 5, 7 can have the same or different widths. Mostly they are of the same width. Sections 6, usually equal to or less than (≤) half the sum of the widths of the zones 5, 7 and consists predominantly of only 5-25% of this amount. If, for example, the width of the zones 5, 7 elect 7.0 mm, the width of the sections 6 is only 0.7 to 3.5 mm Sections 6 can have, however, different widths, however, should not exceed a maximum of 50% of the total area and are predominantly in the range of 10-33% relative to the total area of the embossed nonwoven material. Especially preferred is, however, a three-dimensional appearance with the same width plots 6.

On the lower side is used as HRV nonwoven material with three-dimensional stamping can be subsequently applied hydrophilic (or made absorbent by the addition of wetting) binder. Under the lower side should be understood that the side surface of which is limited to non-embossed uchastki and recesses 4b, 8b. Such unilateral application of binder may be preferable in order to further stabilize the three-dimensional structure and due to the increased hydrophilicity can facilitate the transport of fluid in the direction of the absorbent core.

Example 1

In the direction of unwinding stacked pile of twisted staple fibers of polyester with title 6, 7 dtex and a cut length of 51 mm Unit weight of the pile was 45 g/m2. A cloth moistened with water to facilitate subsequent filling of the binder. As a binder used aqueous polymer dispersion based on carboxylating copolymer of butadiene and styrene. Hardness And shore obtained from this binder film was 90-95. 50%dispersion of injected lubricant, a little pigment dye and water as the diluent, so that there is a "watered down" 40%of the mixture. This mixture on the one hand through the shaft "Pico", recesses which are filled with this mixture, was applied to a fibrous pile. During drying at 180°on the drying cylinders binder partially migrated in the direction of the free side. Due to this, there was a concentration gradient spanning from one side of the nonwoven material to another. After drying, the material was left in the dryer until then, until there is a complete film formation of tie points is found. The applied amount of this relatively firm carboxylating butadiene-styrene latex was 15 g/m2. Hence, the ratio of fiber:binder 75:25.

Properties (thickness, elastic recovery, etc.) this non-embossed material are contrasted in table 1 the properties of the embossed material.

This intermediate product was then subjected to embossing, according to the invention, and used tonilee device figs.4-6.

7 in an enlarged view shows the cross section of the toothed disk, gidenotes the inner radius of the toothed disk, a raits outer radius. The height h of the teeth is calculated by the difference of raand ri. The distance ti(arc) on the inner side and the distance taon the outside are calculated according to the formula for the circumference u=2rπ. Circle uaand uiis calculated from multiplying the number of teeth z of the toothed disk on the step, respectively, tiand ta:

ua=z·taand ui=z·ti

In examples 1 and 2 used tinyline shafts with toothed rims in the following sizes and shapes:

z=28 grams

ri=35 mm

rand=37,5 mm

Using the above mathematical relations are calculated the following values of tiand ta:

ti=a 7.85 mm and ta=to 8.41 mm

Due to the narrowing of the teeth in the direction of what the current side of the shaft and the circular shaft diameter for distances d iand datrue:

da>di

In example 1, the ratio of da:diis 2,88:1,0.

The width of the spacers 12 (figure 4) is 0.20 mm, and the width of the notched discs - 0.75 mm, due to which the share of the non-embossed section 6 is about 20% of the total area of non-woven material.

Non-woven material 20 with a unit weight of 60 g/m2pass through the gap between the two members to each other tinylime shafts 21, 22 with a speed of 10 m/min (600 m/h). The temperature of the periphery of the pinion shaft 21 of steel SAE 1045 125°C. the pinion shaft 22 of the polyamide made unheated and slightly heated during rotation. Lowering the temperature of the steel shaft is compensated an additional source 26 of heat. The receiving shaft 24 is made to be cooled. The material is then wound with a lower tension.

Example 2

Acted as in example 1, but with the difference that the specific gravity of the pile was reduced to 31 g/m2. The proportion of binder was 12 g/m2that corresponded to the ratio of fiber:binder of about 73:27. Three-dimensional embossing was carried out in accordance with example 1.

Comparative example 1

Manufactured in example 1, the associated binder nonwoven fabric with a unit weight of 60 g/m2was subjected to embossing in accordance with the prior art. For this purpose was made, the Jena pair of shafts, in which the spacer disks 12 have been worn between the toothed disks on a cone, and the toothed discs have the same position, i.e. were not staggered. The height of the teeth was selected in the same way as in example 1.

Manufactured in example 1, the associated connecting prefabricated nonwoven fabric with a unit weight of 60 g/m2was subjected to embossing under the conditions of example 1.

This traditionally textured reference sample with the corrugation of approximately the corrugated cardboard of the type experienced on the thickness, the capacity for resilient recovery and creep resistance. The results for the reference sample, the non-embossed semi-finished product and the sample of example 1 are shown in table 1.

Applicable test methods

- Liquid Strike Through time oozing) EDANA 150.3-96 (Lister).

- Coverstock Rewet (also called Wet Back - wet) on EDANA 151.1-96.

Time leakage was measured after the 1st, 2nd and 3rd fill with liquid and the wet - after the 3rd fill with fluid.

Table 1 shows the test results of examples 1 and 2 and non-embossed embossed associated binder nonwoven materials as arithmetic mean values, respectively, on three separate measurements.

Table 1
Time PR is sachivalaya and wet, measured directly on the sample to be tested (outside of the diaper) method with EDANA test device Lister.
The test sampleTime oozing (C) after the 1st, 2nd and 3rd fillThe wet (g)
1x23(g)
Example 1, non-embossed0.911.922.210.07
Example 1, embossed0.040.010.100.06
Example 2, non-embossed0.030.690.940.08
Example 2, embossed0.000.020.020.04

The results in table 1 show that, in particular, the time oozing from embossed nonwoven fabric according to the invention, significantly lower (better)than in the non-embossed condition. Also, the wet visible improvement, which, however, is less characteristic than the time oozing. While Kang-test conducted on the diaper (table 2), the results of the wet, on the contrary, even more significantly improved than during the test Lister on EDANA.

- Liquid Strike Through time oozing with so-called Kang-the Estai, Stockhausen S.OSSE.204-3.0, measured on the diaper:

Opened regular diaper size maxi plus" without vpityvaya-distribution layer and between the absorbent core and a covering layer (top sheet) put the test sample as vpityvaya-distribution layer. Then the diaper is again closed and thus subjected Kang-test.

As a test liquid for each sample used 120 ml of 0.90%-aqueous solution of sodium chloride (so-called artificial urine). After placing the diaper in the center between the plastic body round shape (corresponding to the shape of the body) and girding his textile tape plastic body loaded by a load of 12.5 kg Then 120 ml of liquid was poured into a vertically oriented (for girls, unisex) cylinder test apparatus and timed to the full infiltration of the liquid in the diaper (seepage 1).

After a timeout, respectively, for 20 minutes was performed a second time (seepage 2) and third (seepage 3) measurements with the same amount of liquid (120 ml).

Rewet (wet) with the so-called Kang-test Stockhausen S.OSSE.204-3.0 measured on diaper:

To determine the nature of the wetting after complete infiltration of the third fluid waited 20 minutes, the diaper was removed from the measuring equipment and raskladyvaya the table. Weighted stack of the three filter paper with a unit weight of 40 g/m2each was placed at the point of entry of liquid into the diaper and was loaded with a cargo weight of 1270 g (which corresponds to a compressive load of about 20 g/cm2). After 20 minutes, the stack of filter paper was weighed. The lower the value, the more remains dry the baby's skin.

Table 2
Results time of infiltration (Strike Thriough Time and Rewet, determined by the so-called method of Kang.
SizeKant test
nappies maxi plus"The time of infiltration (C) after 1st, 2nd, 3rd fill fluidWet
1x23(g)
Brand diaper N21 - original13.527.534.037.2
Brand diaper No. 1 - open11.325.533.031.5
Brand diaper # 2 - original13.533.543.311.9
Brand diaper No. 2 - open14.052.30.0 0.44
Brand diaper # 3 - original22.230.353.516.1
Brand diaper No. 3 - open23.147.965.220.9
Diaper with embossed HRV example 15.39.512.10.28

Table 2 shows that the nonwoven material according to the invention, placed in a diaper as HRV, has significantly better properties.

Creep resistance

For determination of creep resistance chiseled samples format about 7×7 cm and was kondicionirovanie in the laboratory for 25 hours. To determine the average of the values was performed on three separate measurements.

The sample was loaded within 72 hours at 45°With a force of 7.2 kPa. Load the place was noted. After that, the sample was removed from the furnace and unloaded for 2 minutes. Then measured the thickness with a compressive force of 0.5 kPa and an area of 25 cm2. After a rest (break) for 2 and 24 hours thickness was measured again.

Table 3
Thickness measurement after termojaderni (resistance stability) and after different rest time without load is
The test sampleThe original thickness beforeAfter aging for 72 hours at 45°and With the force of 7.2 kPa and after rest time t
load at 45°t=01=2Ht=244
mm at 0.5 kPamm at 0.5 kPamm at 0.5 kPamm at 0.5 kPa
Example 1 without stamping0.920.590.630.68
Example 1 a three-dimensional embossed2.560.670.720.91
Standard1.870.510.540.60

The original thickness of the reference sample with traditional embossed (corrugation) shows after load of 0.5 kPa is noticeably thinner than in example 1 with three-dimensional stamping method according to the invention.

Specific volume (SV)

The thickness d was measured under a load of 0.50 and 6.2 kPa. By following the recalculation of the received value of the specific volume in cm3/g (the inverse of specific volume density):

SV=(d/FG)×1000 (cm3/g)

Thus FG denotes the specific gravity of nonwoven material in g/m2and d is the thickness in mm

Table 4
Specific volume.
The test sampleSpecific volume (cm3/g)Relative specific volume (%)
At 0.5 kPaWhen to 6.2 kPaAt 0.5 kPaWhen to 6.2 kPa
Example 1 without stamping15.311.6100100
Example 1 a three-dimensional embossed42.614.7278127

1. The product of non-woven material with three-dimensional stamping, in particular, flat shape, wherein the non-woven material (1) consists of fibers and/or of filaments (3) and has on both their sides of the zone (5, 7) with uniformly or irregularly alternating elevations (4A, 8A) and grooves (4b, 8b), which are separated from each other across the direction (2) transport of material non-embossed solid sections (6), which are elongated in the direction of (2) transport material and take from 5 to 50% of the surface non-embossed nonwoven fabric (1), and elevation (4A, 8A)located on one side, is formed on the opposite side of the recess, and, accordingly, the recess (4b, 8b)located on one side, is formed on the anti-Christ. alonei side elevation, at this elevation on both sides have been pronounced protruding relative to the surface (28), which on both sides is formed by an imaginary continuation of the non-embossed surface of the solid areas (6).

2. The product according to claim 1, characterized in that the tops of the speakers on both sides of the elevations (4A, 8A) in most of the concern imaginary planes (27), separated from each other by a distance (H) from 0.5 to 5.5 mm

3. The product according to claim 1, characterized in that the vertices of bilateral elevations (4A, 8A) in most of the concern imaginary planes (27), separated from each other by a distance (H) from 0.9 to 4.5 mm

4. Product according to any one of claims 1 to 3, characterized in that the solid parts (6) are in relation to the total area of non-woven material (1) from 10%to 33%.

5. Product according to any one of claims 1 to 3, characterized in that the fiber or filament is oriented mainly in the direction of (2) transport of the material.

6. Product according to any one of claims 1 to 3, characterized in that the elevation (4A, 8A) and deepening (4b, 8b) of the neighboring zones (5, 7) form a lattice pattern.

7. Product according to any one of claims 1 to 3, characterized in that the elevation (4A, 8A) and deepening (4b, 8b) of the neighboring zones (5, 7) are arranged so that when viewed in the direction of (2) threading of exaltation (4A) and deepening (8b) on both sides of the solid sections (6) are symme the ranks.

8. Product according to any one of claims 1 to 3, characterized in that when viewed in the direction of (2) threading of exaltation (4A, 8A) and deepening (4b, 8b) of the neighboring zones (5, 7) on both sides of the solid sections (6) are arranged in a checkerboard pattern.

9. Product according to any one of claims 1 to 3, characterized in that when viewed in the direction of (2) threading of exaltation (4A, 8A) and deepening (4b, 8b) of the neighboring zones (5, 7) on both sides of the solid sections (6) are arranged asymmetrically offset with respect to each other.

10. A method of manufacturing a product according to any one of claims 1 to 9, characterized in that the produced nonwoven material of fibers and/or of filaments (3), oriented mainly in the direction of (2) transport material relative to the set used in its manufacture, and which connect with each other, and the resulting non-woven material is treated at a temperature of from 65 to 160°using at least one tinylogo shaft and attach non-woven material three-dimensional shape.

11. The method according to claim 10, characterized in that the fiber or filament connect binder.

12. The method according to claim 11, characterized in that the binder is applied to the canvas with one hand.

13. The method according to claim 11, characterized in that the binder to add a wetting agent.

14. The method according to any of PP-13, characterized in that ploshnye areas (6) to, during or after deformation tinyline shaft increase through at least one re-application of the binder.

15. The method according to 14, characterized in that the repeated application of the binder is carried out by spraying or padding on continuous areas (6).

16. The method according to any of PP, characterized in that the binder is applied again from both sides of the solid areas (6).

17. The device for implementing the method according to any one of p-16, characterized in that it comprises at least two tinylinux shaft (21, 22)mounted in engagement with each other with the possibility of transmission between them and the deformation of the nonwoven fabric (1), and tinyline shafts (21, 22) consist of toothed discs (11)located on the axis (13) and separated from each other by spacers (12).

18. The device according to 17, characterized in that the toothed discs (11) have a direct or oblique teeth.

19. Device according to any one of p and 18, characterized in that the toothed discs (11) tinylinux shafts (21, 22) made of the same or different materials, including iron, copper, aluminum or their alloys or polymers.

20. Device according to any one of p and 18, characterized in that the toothed discs (11) one tinylogo shaft (21) is made of aluminum, and the other tinylogo shaft (22) is made of polyamide.

21. Device according to any one of p and 18, characterized in that the in tinily the shaft is made to be heated.

22. Device according to any one of p and 18, characterized in that it contains teploizolyatsii (26).



 

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